panbingkun opened a new pull request, #43593:
URL: https://github.com/apache/spark/pull/43593
### What changes were proposed in this pull request?
The pr aims to fix `legacy-binding`, message as follows:
```
[error]
/Users/panbingkun/Developer/spark/spark-community/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala:1315:39:
reference to child is ambiguous;
[error] it is both defined in the enclosing method apply and inherited in
the enclosing anonymous class as value child (defined in class IsNull)
[error] In Scala 2, symbols inherited from a superclass shadow symbols
defined in an outer scope.
[error] Such references are ambiguous in Scala 3. To continue using the
inherited symbol, write `this.child`.
[error] Or use `-Wconf:msg=legacy-binding:s` to silence this warning.
[quickfixable]
[error] Applicable -Wconf / @nowarn filters for this fatal warning:
msg=<part of the message>, cat=other,
site=org.apache.spark.sql.catalyst.expressions.IsUnknown.apply
[error] override def sql: String = s"(${child.sql} IS UNKNOWN)"
[error] ^
```
### Why are the changes needed?
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Pass GA
Manually test:
### Was this patch authored or co-authored using generative AI tooling?
No.
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